port to RPC program number mapper

is a server that converts RPC program numbers into DARPA protocol port numbers. It must be running in order to make RPC calls.

When an RPC server is started, it will tell portmap what port number it is listening to, and what RPC program numbers it is prepared to serve. When a client wishes to make an RPC call to a given program number, it will first contact portmap on the server machine to determine the port number where RPC packets should be sent.

Portmap must be started before any RPC servers are invoked.

Normally portmap forks and dissociates itself from the terminal like any other daemon. Portmap then logs errors using syslog(3) .

Options available:

-d

(debug) prevents portmap from running as a daemon, and causes errors and debugging information to be printed to the standard error output.

-t dir

(chroot) tell portmap to chroot() into dir . dir should be empty, not writeable by the daemon user, and preferably on a filesystem mounted read-only, noexec, nodev, and nosuid.

-v

(verbose) run portmap in verbose mode.

-i address

bind portmap to address. If you specify 127.0.0.1 it will bind to the loopback interface only.

This portmap version is protected by the tcp_wrapper library. You have to give the clients access to portmap if they should be allowed to use it. To allow connects from clients of the network 192.168. you could use the following line in /etc/hosts.allow:

portmap: 192.168.

You have to use the daemon name portmap for the daemon name (even if the binary has a different name). For the client names you can only use the keyword ALL or IP addresses (NOT host or domain names).

For further information please have a look at the tcpd((8)) , hosts_allow() and hosts_access() manual pages.

If portmap crashes, all rpc servers must be restarted.

The command appeared in

This manual page was changed by Anibal Monsalve Salazar for the Debian Project.